See the nerves_system_bbb, nerves_system_rpi, etc. projects on GitHub.
This allows the configurations to be updated independent of nerves_system_br
and supports integration with mix.
Integrate this with a guide to creating system images
This README documents Nerves-specific configuration of Buildroot that may not be obvious.
If unchanged, the default locale is "C" using the latin1 encoding. This can be
checked by calling file:native_name_encoding/0. Elixir produces a warning
when loading if not using UTF-8. The following configuration items enable UTF-8 at
the cost of adding the file locale-archive to the root filesystem.
BR2_ENABLE_LOCALE_PURGE=y
BR2_ENABLE_LOCALE_WHITELIST="locale-archive"
BR2_GENERATE_LOCALE="en_US.UTF-8"
You will also need to update the environment variables being passed to start
the Erlang VM. This can be done via the erlinit configuration. Specify:
-e LANG=en_US.UTF-8;LANGUAGE=en
Buildroot can be configured to build a version of Erlang without OpenSSL, but it effectively prevents one from using Cowboy and other web frameworks, so it is enabled by default. See:
BR2_PACKAGE_OPENSSL=y
CONFIG_NLS_CODEPAGE_437 and CONFIG_NLS_ISO8859 need to be enabled or mounting FAT filesystems created by
fwup will fail or mount readonly.